<template>
  <section class="todoapp">
    <!-- 除了驼峰, 还可以使用-转换链接 -->
    <TodoHeader :list="list" @add="isAddFn"></TodoHeader>
    <TodoMain
      :list='showList'
      @del="delFn"
    ></TodoMain>
    <TodoFooter @change="isFn" :type="getSel" @del='isDel' :num='showList.length'></TodoFooter>
  </section>
</template>

<script>
// 1.0 样式引入
import "./styles/base.css";
import "./styles/index.css";

import TodoHeader from "./components/TodoHeader";
import TodoMain from "./components/TodoMain";
import TodoFooter from "./components/TodoFooter";

export default {
  components: {
    TodoHeader,
    TodoMain,
    TodoFooter,
  },
  data() {
    return {
      list: [
        { id: 100, name: "吃饭", isDone: true },
        { id: 101, name: "睡觉", isDone: false },
        { id: 102, name: "打豆豆", isDone: true },
      ],
      getSel: "all",
    };
  },
  methods: {
    isAddFn(task) {
      this.list.push({
        id: this.list.length ? this.list.at(-1).id + 1 : 100,
        name: task,
        isDone: false,
      });
    },
    delFn(id) {
      this.list = this.list.filter((item) => item.id !== id);
    },
    isFn(type) {
      this.getSel = type;
    },
    isDel() {
      this.list = this.list.filter((item) => !item.isDone);
    }
  },
  computed: {
    showList() {
      if (this.getSel === "yes") {
        return this.list.filter((item) => item.isDone);
      } else if (this.getSel === "no") {
        return this.list.filter((item) => !item.isDone);
      } else {
        return this.list;
      }
    },
  },
};
</script>